OneToMany 关系在 Prisma 数据库上工作，但不在服务器上

Question

在创建帖子的突变中，我正在使用以下代码：

async function savePost(parent, args, context, info){

  let data = {...args}
  delete data.categories
  delete data.status

  if (!context.request.userId) {
    throw new Error('Please SignIn to continue.')
  }

  const post = await context.prisma.createPost({
    author: {
      connect: { id: context.request.userId }
    },
    categories: {
      set: args.categories,
    },
    status: args.status,
    ...data
  })

  return post

}

这会将帖子与数据库中的作者联系起来。我通过使用 Database Playground 了解了这一点。

但是，当我控制台记录 postToUpdate 时，它​​返回 `author: null! 当我在客户端使用 gql 时，也会发生同样的事情。帖子没有作者！

虽然作者保存在数据库中，但我在客户端和服务器端都看不到他/她。

作为参考，这是数据模型

enum Previledge {
  SUPERADMIN
  ADMIN
  MODERATOR
  AUTHOR
  READER
}

enum Category {
  TECH
  FIN
  DIGIMARK
  CODING
  TUTORIAL
  HOWTO
  WRITING
  INSPIRE
  SCIENCE
  POLITICS
  LIFESTYLE
  FOOD
  BUSINESS
  ENTREPRENEUR
  HISTORY
  HEALTH
  PET
  PARENTHOOD
  TRAVEL
  INDIA
  CHINA
  US
  UK
  WORLD
  NEWS
  REVIEW
}

enum PostStatus {
  PUBLISHED
  DRAFT
  DELETED
}

type Post {
  id: ID! @unique
  title: String!
  editorSerializedOutput: Json!
  editorCurrentContent: Json!
  editorHtml: String!
  updatedAt: DateTime!
  createdAt: DateTime!
  author: User! @relation(name: "PostsAndUser")
  categories: [Category]!
  thumbnail: Json!
  status: PostStatus!
}

type User {
  id: ID! @unique
  socialId: String! @unique
  fname: String!
  lname: String!
  name: String!
  phone: String @unique
  email: String! @unique
  gender: String
  birthday: String
  bio: String
  posts: [Post]! @relation(name: "PostsAndUser")
  profilePicture: String!
  followers: [User]!
  previledge: [Previledge]!
  signUpMethod: String!
  accessToken: String!
  updatedAt: DateTime!
  createdAt: DateTime!
}

这是整个架构：

# import * from './generated/prisma.graphql'

scalar DateTime

type Message {
  code: Int
  message: String
}

type Mutation {
  signIn(
    socialId: String!
    fname: String!
    lname: String!
    name: String!
    phone: String
    email: String!
    gender: String
    birthday: String
    bio: String
    profilePicture: String!
    signUpMethod: String!
    accessToken: String!
  ): User!
  signOut: Message
  savePost(
    title: String!
    editorSerializedOutput: Json!
    editorCurrentContent: Json!
    editorHtml: String!
    categories: [Category]!
    thumbnail: Json!
    status: PostStatus!
  ): Post!
}

type Query {
  users: [User]!
  me: User
  canUpdatePost(id: ID!): Post
}

type User {
  id: ID!
  fname: String!
  lname: String!
  name: String!
  phone: String
  email: String!
  gender: String
  birthday: String
  bio: String
  posts(where: PostWhereInput, orderBy: PostOrderByInput, skip: Int, after: String, before: String, first: Int, last: Int): [Post!]
  profilePicture: String!
  followers(where: UserWhereInput, orderBy: UserOrderByInput, skip: Int, after: String, before: String, first: Int, last: Int): [User!]
  previledge: [Previledge]!
  signUpMethod: String!
  updatedAt: String!
  createdAt: String!
}

Answer 1

您需要将info 作为第二个参数传递给Prisma 绑定的createPost 函数。

有可能author 字段正在从客户端查询以响应savePost 突变，但由于没有第二个参数传递给createPost，prisma 仅返回标量字段。由于author 字段在Post 类型中是按要求定义的，因此如果从客户端查询author 但解析器未返回，则GraphQL 验证将失败。

改变这个：

const post = await context.prisma.createPost({
    author: {
      connect: { id: context.request.userId }
    },
    categories: {
      set: args.categories,
    },
    status: args.status,
    ...data
  })

到：

const post = await context.prisma.createPost({
    author: {
      connect: { id: context.request.userId }
    },
    categories: {
      set: args.categories,
    },
    status: args.status,
    ...data
  }, info)

Answer 2

据我所知，如果不指定createPost的第二个参数，它只会返回标量字段。 试试：

  const post = await context.prisma.createPost({
    author: {
      connect: { id: context.request.userId }
    },
    categories: {
      set: args.categories,
    },
    status: args.status,
    ...data
  }, `{
   author {
     id
   }
  }`)

  console.log(post)

另外，您的架构中似乎没有键入 Post，您可能需要再次生成它。